Manufacture of caoutchouc-like bodies



Patented Aug. 15, 1933 UNITED STATES PATENT" OFFICE Jean Baer, Uster, Switzerland No Drawing. Application November 1,

Serial No. 1928 316,62'l, and in Germany June 29,

6' Claims. (01. 260-6) In my pending U. S. patent application Ser. No. 221,399, filed September 22, 1927, I have described a process for the manufacture of caoutcho uc-like bodies consisting in causing alkalior earth-alkali sulphides to react upon halogen derivatives of the saturated hydrocarbons CnHm+g. Now, I have found that similar caoutchouclike bodies are obtained if di-halogenated unsaturated hydrocarbons are heated with an alkali or alkali-earth metal monoor polysulphide solution.

The following examples illustrate the invention, the parts being by weight.

(1) 5 parts oi isoprenedibromide are heated 1 with 150 parts of an ordinary commercial lime sulphur solution or a calcium polysulphide solution during one hourto about 80 C. There is formed'by this reaction a tough product of polymerization rich in sulphur, which is completely insoluble inwater and also difliculty soluble in many organic solvents.

(2) 10 parts of butadiendichloride and 300 partsof a 15'percent solution of potassium sul phide are heated together during 1 /2 hours to 90 C. A tough caoutchouc-like product of polymerization is precipitated which can be worked up to any caoutchouc substitution product.

The above process is applicable to any dilialogenated unsaturated hydrocarbons. Polysulphides of alkali metals and alkali-earth metals are preferable for the reaction therewith.

What is claim is: Y 1. A process for the manufacture of caoutchouclike bodies, consisting in heating a dihalogen derivative of a hydrocarbon selected from the unsaturated hydrocarbon group consisting of isoprene and butadien at temperatures of about 80 to about 90 C. with an alkali-forming metal pblysulphide solution.

2. A process for the manufacture of caoutchouclike bodies, consisting in heating a dihalogen derivative of a hydrocarbon selectedfrom the unsaturated hydrocarbon group consisting of isoprene and butadien at temperatures of about 80 to about 90 C. with a solution of an alkali metal polysulphide.

3. A process for the manufacture of caoutchouclike bodies, consisting in heating a dihalogen derivative of a hydrocarbon selected from the unsaturated hydrocarbon group consisting of isoprene and butadien at temperatures of about g to about 90 C. with a solution of an alkali-earth metal polysulphide.

4. A process for the manufacture of caoutchouclike bodies, consisting in heating di-halogenated isoprene at a temperature of about 80 C. with an alkali-forming metal polysulphide solution.

5. A process for the manufacture of caoutchouc- 89 like bodies, consisting in heating di-halogenated isoprene at a temperature of about 80 C with asolution of an alkalhearth metal polysulphide.

6. A process for the manufacture of caoutchouclike bodies, consisting in heating di-halogenated butadien at a temperature of about 90 C. with a solution of an alkali-metal polysulphide.

JEAN BAER. 

